Rear Projection Television Demystified
Like many people, you may be filled with a burning curiosity to know what makes a rear projection TV work. Well, it’s pretty much done with smoke and mirrors. (Just kidding – if there is smoke appearing out of your RPTV you have a serious problem!)
Basically, a video image is projected via a projectors lamp inside the television, then a system of mirrors and lenses direct the image onto the internal surface of a see-through screen.
When this technology was first introduced, CRTs (cathode ray tubes – the things that made old-fashioned TV sets so bulky) were used, and it worked very well. The problem was that the tube made the case very heavy and, usually, a floor standing cabinet was needed to accommodate it.
Eventually,In the end, as screens grew bigger, and the industry began to adopt the new, wider 16:9 aspect ratio (the ratio of height to width), those old CRT cabinets were gradually replaced by newer models which deliver high quality performance in light, compact enclosures.
Rear-projection TVs come ready with high-definition capability these days. This is a very important point – they come equipped to handle everything HDTV broadcasting and discs can demand of them. And make no mistake – High Definition Television will produce wide-screen images in much better clarity and detail than we are used to from traditional televions. As well as tuners for analog and cable television – not to mention the ability to receive digital cable signals without requiring a set top box – high definition tuners are included in all modern rear-projection TVs, which makes them capable of taking full advantage of all the exciting television innovations which will be upon us soon.
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Filed under: General Interest